The invention discloses a dumping prevention air purification device. A first fixed plate and a second fixed plate are arranged at the side surface of a quadrangular main body; one end of the first fixed plate is rotationally connected with the middle of the side surface of the quadrangular main body through a first hinge; the other end of the first fixed plate is hinged to the second fixed platethrough a second hinge. When the first fixed plate and the second fixed plate are attached onto the outer wall of the quadrangular main body in a detachably connected way, a first clamp groove and a second clamp groove are respectively and correspondingly processed in the outer side positions of the first fixed plate and the second fixed plate and can be clamped, the first clamp groove and the second clamp groove can be connected and fixed on a fixing post; the bottom of the fixing post is fixed on the upper surface of a round bottom plate. The dumping prevention air purification device has the advantages that through the structures of the first fixed plate and the second fixed plate, the air purification device can be fixed on a floorboard; the contact area with the bottom surface is increased through the bottom plate, so that the floor grasping force is enhanced; the damping of the device is further prevented.